CN102655575A - Audio frequency transmission method in audio-visual playing system and audio-visual playing system - Google Patents
Audio frequency transmission method in audio-visual playing system and audio-visual playing system Download PDFInfo
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Abstract
The invention relates to multimedia audios and videos, and discloses an audio frequency transmission method in an audio-visual playing system and the audio-visual playing system. According to the invention, a remote controller indicates a player to set a frequency point for transmitting frequency modulation (FM) audio signals, and the player feeds back the set frequency point to the remote controller after completing the set of the frequency point. The remote controller receives the audio signal FM audio signals emitted by the player on the frequency point, and outputs the received audio signals. The FM audio signals can be transmitted between the player and the remote controller, thus a use can listen to the content of audio/video playing in a radio manner, the length of an earphone cord is shortened, broadcasting is supported, the number of listening persons is not limited, and the audio-visual playing system has no need of configuring a receiving earphone for each person and is low in cost.
Description
Technical field
The present invention relates to multimedia video, particularly the audio frequency reception technique in the video-audio playing system.
Background technology
Traditional home audio-visual system is as shown in Figure 1, is made up of three parts: television set, player, remote controller.Wherein remote controller is used for player and TV are controlled, and sound and image all appear through TV.Particularly, remote controller sends corresponding control information through the infrared transmission module that comprises to television set and player, and player and TV are controlled; Television set and the player infrared receiving module through comprising receives from control of remote controller information.
In video-audio playing system, the audio frequency of broadcast is play through the loud speaker of external speaker or TV.Receive audio frequency with wireless form if desired, then need use wireless headset.At present, receive ANTENNAUDIO through bluetooth usually.
Yet inventor of the present invention finds that bluetooth is not supported broadcasting, the people's who has limited tin number, and general home theater, and the number of watching is indefinite, if corresponding reception earphone is provided to greatest extent, the height that cost can be has very limited application.
Summary of the invention
The object of the present invention is to provide audio transmission method and video-audio playing system in a kind of video-audio playing system, realize that at lower cost ANTENNAUDIO receives.
For solving the problems of the technologies described above; Execution mode of the present invention provides the method for the audio transmission in a kind of video-audio playing system; Video-audio playing system comprises remote controller and player; This remote controller and player are used for receiving and sending audio signal, and the audio transmission method in this video-audio playing system comprises following steps:
Remote controller indication player is provided for the frequency of transmitting audio signal, and audio signal is the audio signal of frequency modulation;
Player feeds back to remote controller with the frequency that is provided with after accomplishing being provided with of frequency;
Player is launched the audio signal of frequency modulation on frequency, remote controller receives the audio signal of frequency modulation on frequency, and the audio signal that receives is exported through earphone.
Execution mode of the present invention also provides a kind of video-audio playing system, comprises remote controller and player, and remote controller comprises:
The control information sending module is used for sending the indication that frequency is set to player;
The frequency point information receiver module is used for receiving the frequency that this player is provided with from player;
The audio signal receiver module is used on frequency receiving the audio signal of the frequency modulation of player emission;
The earphone power amplifier module, the audio signal of the frequency modulation that is used for the audio signal receiver module is received is exported through earphone;
Player comprises:
The control information receiver module is used to receive the indication that frequency is set from remote controller;
The frequency point setting module is used for after the control information receiver module is received the indication from remote controller, is provided for transmitting the frequency of the audio signal of frequency modulation;
The frequency point information sending module is used for sending the frequency that the frequency point setting module is provided with to remote controller;
The audio signal transmitter module is used for the frequency in the setting of frequency point setting module, the audio signal of emission frequency modulation.
Embodiment of the present invention compared with prior art, the main distinction and effect thereof are:
Remote controller indication player is provided for transmitting the frequency of the audio signal of frequency modulation, and player feeds back to remote controller with the frequency that is provided with after accomplishing being provided with of frequency.Remote controller is in the audio signal that receives the frequency modulation that player launches on this frequency on this frequency, and with the audio signal that receives through earphone output.Owing to can transmit the audio signal of frequency modulation between player and the remote controller; Therefore can listen to the content of audio-visual broadcast with wireless form, reduce the length of earphone cord, and support broadcasting; Need not limit the number of listening; Need be for everyone is equipped with corresponding reception earphone yet, with low cost, on the basis that does not increase equipment, realize function easily.
Further; After player is accomplished being provided with of frequency, also need emissioning testing signal on frequency, remote controller feeds back to player with the intensity of the test signal that receives; Player is according to the intensity of the test signal of feedback; The transmitting power of adjustment audio signal, thus guaranteed under the situation that can normally receive, to use minimum transmitting power, reduced the interference that other channels are caused as much as possible.
Further, remote controller sends the control information that frequency is set through infrared ray to player, and player feeds back to remote controller with frequency through infrared ray.Owing in remote controller, itself just possessed the infrared emission function, therefore, not only realized Based Intelligent Control through the infrared control function of multiplexing remote controller, reduced cost and material simultaneously again.
Further, the frequency that is used for transmitting audio signal can adopt the manual mode setting, also can adopt the automatic mode setting, makes the present invention can adapt to flexible and changeable application scenarios.
Further; When adopting automatic mode to be provided for the frequency of transmitting audio signal; Detected idle frequency being shown to the user through display unit (like video screen), supplying the user to confirm, will be the frequency that is used for transmitting audio signal through the idle frequency point setting that the user confirms.Because the idle frequency that searches automatically is the frequency of the intensity of signal under current environment less than threshold value; Can not guarantee after a period of time in the intensity of signal all the time less than threshold value; Therefore by the user the idle frequency that searches is automatically confirmed, can be utilized user's experience further to guarantee the applicability of this frequency.
Further, can also the frequency that be provided be presented on the display unit, thereby make other FM receiver; Also can be according to the frequency that is presented on the display unit; The frequency of manual adjustments FM receiver receives player is launched frequency modulation on frequency audio signal, realizes that the ANTENNAUDIO of any multiple spot receives; And the receiver media is a lot, and cost is also low.
Further; Before remote controller indication player is provided for the frequency of transmitting audio signal; Remote controller can be according to the instruction of user's input; Need to judge whether the audio signal of transmission frequency modulation, transmit the audio signal of frequency modulation if desired, then indicate player to be provided for the frequency of transmitting audio signal again.Make and use when conventional; When promptly the loud speaker through external speaker or TV plays sound, need between player and remote controller, not transmit the audio signal of frequency modulation, the earphone output circuit of remote controller end does not need work yet; Be equal to common remote controller, effectively reduce power consumption.
Description of drawings
Fig. 1 is according to home audio-visual system construction drawing of the prior art;
Fig. 2 is according to the audio transmission method flow diagram in the video-audio playing system of first embodiment of the invention;
Fig. 3 is a flow chart of selecting frequency according to the automatic mode in the first embodiment of the invention;
Fig. 4 is according to the audio transmission method sketch map in the video-audio playing system of first embodiment of the invention;
Fig. 5 is according to the data flow diagram between player in the first embodiment of the invention and the remote controller;
Fig. 6 is according to the audio transmission method sketch map in the video-audio playing system of second embodiment of the invention;
Fig. 7 is the video-audio playing system structural representation according to third embodiment of the invention.
Embodiment
In following narration, many ins and outs have been proposed in order to make the reader understand the application better.But, persons of ordinary skill in the art may appreciate that even without these ins and outs with based on the many variations and the modification of following each execution mode, also can realize each claim of the application technical scheme required for protection.
For making the object of the invention, technical scheme and advantage clearer, will combine accompanying drawing that execution mode of the present invention is done to describe in detail further below.
Core of the present invention is, remote controller indication player is provided for the frequency of transmitting audio signal, and audio signal is the audio signal of frequency modulation, and player feeds back to remote controller with the frequency that is provided with after accomplishing being provided with of frequency.Player is launched the audio signal of frequency modulation on frequency, remote controller receives the audio signal of frequency modulation on frequency, and the audio signal that receives is exported through earphone.
First embodiment of the invention relates to the audio transmission method in a kind of video-audio playing system, and idiographic flow is as shown in Figure 2.
In step 201, when needs start frequency modulation (Frequency Modulation is called for short " FM ") audio transmission; Remote controller sends control information to player; The indication player is provided for the frequency of transmitting audio signal, and wherein, audio signal is the audio signal of frequency modulation.Specifically, remote controller can send the control information that frequency is set to player through infrared ray, and the indication player is provided with frequency.
What deserves to be mentioned is that in this execution mode, remote controller can need judge whether the audio signal of transmission frequency modulation according to the instruction of user's input.Such as remote controller shows FM earphone menu through video screen, if the user selects to launch the FM ear-phone function, then explanation needs the audio signal of transmission frequency modulation, gets into step 201.
Then, in step 202, judge and in player, whether adopt automatic mode to select frequency.In this execution mode, the frequency point selection pattern can be divided into automatic selection and manually select two kinds of patterns, adopts automatic mode to select frequency if desired; Then get into step 203; If do not adopt automatic mode to select frequency, promptly adopt manual mode to select frequency, then get into step 206.
In step 203, which frequency player can be searched for and analyze automatically and be suitable for transmitting audio signal, then this frequency is presented on the video screen.
Then, in step 204, the idle frequency that searches is confirmed, if the user confirms this frequency, then got into step 205, otherwise get back to step 203, continue to search for and analyze which frequency automatically and be suitable for transmitting audio signal by the user.That is to say, the frequency that searches is presented on the display screen, if the user is dissatisfied, can repeat search.
The concrete realization flow of step 203 and step 204 is as shown in Figure 3, in step 301, preestablishes the threshold value that is used for input, and this threshold value is set at a lower numerical value according to actual conditions.Then, begin from current frequency, frequency of every stepping just detects the intensity of a signal, if the strength ratio preset threshold of signal is little, thinks that then this frequency is idle, does not have the interference in other radio station, is suitable for transmission of audio signals.Final frequency also need be confirmed by the user, if the user confirms that then search finishes, if the user thinks that the result is nonconforming, then can proceed step-searching, like step 302 to step 304.
After step 204, get into step 205, will through the idle frequency point setting that the user confirms the frequency that is used for transmitting audio signal.When adopting automatic mode to be provided for the frequency of transmitting audio signal, detected idle frequency is shown to the user through video screen, supply the user to confirm, will through the idle frequency point setting that the user confirms the frequency that is used for transmitting audio signal.Because the idle frequency that searches automatically is the frequency of the intensity of signal under current environment less than threshold value; Can not guarantee after a period of time in the intensity of signal all the time less than threshold value; Therefore by the user the idle frequency that searches is automatically confirmed, can be utilized user's experience further to guarantee the applicability of this frequency.
If adopt manual mode to select frequency, then get into step 206.In step 206, judge whether to prolong the frequency that was provided with last time, if prolong the frequency that was provided with last time, then directly get into step 208, if do not prolong the frequency that was provided with last time, then get into step 207, the frequency that this is used for transmitting audio signal manually is set.
Then, get into step 208, player feeds back to remote controller with the frequency that is provided with, and particularly, player can feed back to remote controller with the frequency that is provided with through infrared ray.Need to prove that in this step, player also needs on the frequency that is provided with initialization transmitting power emissioning testing signal.
In step 209, remote controller receives the frequency that player is provided with through infrared ray, acceptance test signal on this frequency, and the intensity of the test signal that receives fed back to player through infrared ray.
Then, in step 210, player is adjusted the transmitting power of audio signal according to the intensity of the test signal of feedback, and on the frequency that is provided with, launches the audio signal of frequency modulation with adjusted transmitting power.Player is adjusted the transmitting power of audio signal according to the intensity of the test signal of feedback, can effectively guarantee under the situation that can normally receive, to use minimum transmitting power, has reduced the interference that other channels are caused as much as possible.
Then, in step 211, remote controller receives the audio signal of frequency modulation on the frequency that player is provided with, and through earphone output.
That is to say, not only be integrated with infrared receiving function in the player in this execution mode, also be integrated with infrared emission function and FM emission function; Not only be integrated with the infrared emission function in the remote controller, also be integrated with infrared receiving function, FM receiving function and earphone output function, as shown in Figure 4.In the two-way Infrared Transmission path between remote controller and the player, the one tunnel is used for remote controller sends order to player and television set, and other one the tunnel is used for the current FM emission frequency of player feedback meeting gives remote controller; FM path between remote controller and the player is used to transmit the audio signal of frequency modulation, and is as shown in Figure 5.Wherein, player is connected to large screen television, also can be to be integrated into the TV the inside.
In this execution mode,, therefore can listen to the content of audio-visual broadcast with wireless form owing to can transmit the audio signal of frequency modulation between player and the remote controller; Reduced the length of earphone cord; And support broadcasting, and need not limit the number of listening, need not be equipped with corresponding reception earphone for everyone yet; With low cost, on the basis that does not increase equipment, realize function easily.In addition; Before remote controller indication player is provided for the frequency of transmitting audio signal; Remote controller can be according to the instruction of user's input; Need to judge whether the audio signal of transmission frequency modulation, transmit the audio signal of frequency modulation if desired, then indicate player to be provided for the frequency of transmitting audio signal again.Make and use when conventional; When promptly the loud speaker through external speaker or TV plays sound, need between player and remote controller, not transmit the audio signal of frequency modulation, the earphone output circuit of remote controller end does not need work yet; Be equal to common remote controller, effectively reduce power consumption.
And in this execution mode, remote controller sends the control information that frequency is set through infrared ray to player, and player feeds back to remote controller with frequency through infrared ray.And,, not only realized Based Intelligent Control therefore through the infrared control function of multiplexing remote controller owing in remote controller, itself just possessed the infrared emission function, reduced cost and material simultaneously again.In addition, be appreciated that between remote controller and the player, also can adopt other modes to realize digital communication, transmission is provided with the control information of frequency and the feedback of frequency, does not give an example one by one at this.
Second embodiment of the invention relates to the audio transmission method in a kind of video-audio playing system.Second execution mode improves on the basis of first execution mode, and main improvements are: in this execution mode, can also the frequency of player setting be presented on the video screen; Thereby make other FM receiver; Also can be according to the frequency that is presented on the video screen, the frequency of manual adjustments FM receiver receives player is launched frequency modulation on frequency audio signal; The ANTENNAUDIO of realizing any multiple spot receives; As shown in Figure 6, and the receiver media is a lot, and cost is also low.
Need to prove that each method execution mode of the present invention all can be realized with modes such as software, hardware, firmwares.No matter the present invention be with software, hardware, or the firmware mode realize; Instruction code can be stored in the memory of computer-accessible of any kind (for example permanent or revisable; Volatibility or non-volatile; Solid-state or non-solid-state, fixing perhaps removable medium or the like).Equally; Memory can for example be programmable logic array (Programmable Array Logic; Abbreviation " PAL "), random access memory (Random Access Memory; Abbreviation " RAM "), programmable read only memory (Programmable Read Only Memory is called for short " PROM "), read-only memory (Read-Only Memory is called for short " ROM "), Electrically Erasable Read Only Memory (Electrically Erasable Programmable ROM; Abbreviation " EEPROM "), disk, CD, digital versatile disc (Digital Versatile Disc is called for short " DVD ") or the like.
Third embodiment of the invention relates to a kind of video-audio playing system.As shown in Figure 7, this video-audio playing system comprises remote controller and player.Wherein, remote controller comprises:
The control information sending module is used for sending the indication that frequency is set to player.
The frequency point information receiver module is used for receiving the frequency that this player is provided with from player.
The audio signal receiver module is used for the frequency that receives at the frequency point information receiver module, receives the audio signal of the frequency modulation of player emission.
The earphone power amplifier module, the audio signal of the frequency modulation that is used for the audio signal receiver module is received is exported through earphone.
In remote controller, can also comprise the startup module, be used for instruction according to user's input, need to judge whether the audio signal of transmission frequency modulation, and when judgement needs the audio signal of transmission frequency modulation, trigger the control information sending module.
Player comprises:
The control information receiver module is used to receive the indication that frequency is set from remote controller.
The frequency point setting module is used for after the control information receiver module is received the indication from remote controller, is provided for transmitting the frequency of the audio signal of frequency modulation.
The frequency point information sending module is used for sending the frequency that the frequency point setting module is provided with to remote controller.
The audio signal transmitter module is used for the frequency in the setting of frequency point setting module, the audio signal of emission frequency modulation.
Wherein, the frequency point setting module comprises the model selection submodule, manually submodule and submodule is set automatically is set.
The model selection submodule is used for the selection according to the user, and decision-making triggers submodule manually to be set or to trigger submodule is set automatically
Submodule manually is set is used to adopt manual mode to be provided for the frequency of transmitting audio signal.This manually is provided with submodule and comprises following subelement:
Frequency prolongs uses judgment sub-unit, is used to judge whether to prolong the frequency that was provided with last time;
Frequency manually is provided with subelement, is used for prolonging with judgment sub-unit at frequency judging that when prolonging the frequency that was provided with last time, the frequency that will be provided with last time is used for the frequency of transmitting audio signal as this; Prolong at frequency and to judge with judgment sub-unit and to reset the frequency that this is used for transmitting audio signal by the user when not prolonging the frequency that was provided with last time.
Submodule being set automatically being used for searching for automatically idle frequency, and by the user the idle frequency that searches is automatically confirmed, will be the frequency that is used for transmitting audio signal through the idle frequency point setting that the user confirms.This is provided with submodule automatically and comprises following subelement:
The input subelement is used for beginning from current frequency, and frequency of every stepping just detects the intensity of a signal.
Judgment sub-unit is used for the intensity with the detected signal of input subelement, compares with pre-set threshold, when the intensity of detected signal during less than threshold value, judges that the frequency at this signal place is idle frequency.
Confirm subelement, be used for the idle frequency that judgment sub-unit is judged is shown to the user through display unit (like video screen), supply the user to confirm.
Frequency is provided with subelement automatically, and being used for the idle frequency point setting of confirming through the user is the frequency that is used for transmitting audio signal.
Need to prove that in this execution mode, the audio signal transmitter module in the player also is used for emissioning testing signal on frequency.Control information sending module in the remote controller also is used for the intensity of the test signal that receives is fed back to player.Also comprise adjusting module in the player, be used for intensity, the transmitting power of adjustment audio signal according to the test signal of feedback.Effectively to guarantee under the situation that can normally receive, using minimum transmitting power, reduced the interference that other channels are caused as much as possible.
In addition, in this execution mode, the control information sending module sends the indication that frequency is set through infrared ray to player, and the control information receiver module receives the indication that frequency is set from remote controller through infrared ray.The frequency point information sending module sends the frequency that the frequency point setting module is provided with through infrared ray to remote controller, and the frequency point information receiver module receives the frequency that this player is provided with through infrared ray from player.
Be not difficult to find that first execution mode is and the corresponding method execution mode of this execution mode, this execution mode can with the enforcement of working in coordination of first execution mode.The correlation technique details of mentioning in first execution mode is still effective in this execution mode, in order to reduce repetition, repeats no more here.Correspondingly, the correlation technique details of mentioning in this execution mode also can be applicable in first execution mode.
Four embodiment of the invention relates to a kind of video-audio playing system.The 4th execution mode improves on the basis of the 3rd execution mode, and main improvements are: in this execution mode, video-audio playing system also comprises at least one FM reception end, is used to receive the audio signal of frequency modulation.
The control information sending module also is used for the frequency that the frequency point information receiver module receives is presented at display unit (like video screen).Thereby make other FM receiver, also can be according to the frequency that is presented on the video screen, the frequency of manual adjustments FM receiver receives player launch frequency modulation on frequency audio signal, realizes the ANTENNAUDIO reception of any multiple spot.
Be not difficult to find that second execution mode is and the corresponding method execution mode of this execution mode, this execution mode can with the enforcement of working in coordination of second execution mode.The correlation technique details of mentioning in second execution mode is still effective in this execution mode, in order to reduce repetition, repeats no more here.Correspondingly, the correlation technique details of mentioning in this execution mode also can be applicable in second execution mode.
In each execution mode of the present invention,, therefore can listen to the content of audio-visual broadcast with wireless form owing to can transmit the audio signal of frequency modulation between player and the remote controller; Reduced the length of earphone cord; And support broadcasting, and need not limit the number of listening, need not be equipped with corresponding reception earphone for everyone yet; With low cost, on the basis that does not increase equipment, realize function easily.
Need to prove; Each unit of mentioning in each equipment execution mode of the present invention all is a logical block, and physically, a logical block can be a physical location; It also can be the part of a physical location; Can also realize that the physics realization mode of these logical blocks itself is not most important with the combination of a plurality of physical locations, the combination of the function that these logical blocks realized is the key that just solves technical problem proposed by the invention.In addition, for outstanding innovation part of the present invention, above-mentioned each the equipment execution mode of the present invention will not introduced with solving the not too close unit of technical problem relation proposed by the invention, and this does not show that there is not other unit in the said equipment execution mode.
Though through reference some preferred implementation of the present invention; The present invention is illustrated and describes; But those of ordinary skill in the art should be understood that and can do various changes to it in form with on the details, and without departing from the spirit and scope of the present invention.
Claims (14)
1. the audio transmission method in the video-audio playing system; Said video-audio playing system comprises remote controller and player; Said remote controller and said player are used for receiving and sending audio signal, it is characterized in that the audio transmission method in the said video-audio playing system comprises following steps:
Said remote controller indicates said player to be provided for the frequency of transmitting audio signal, and said audio signal is the audio signal of frequency modulation;
Said player feeds back to said remote controller with the said frequency that is provided with after accomplishing being provided with of said frequency;
Said player is launched the audio signal of frequency modulation on said frequency, said remote controller receives the audio signal of said frequency modulation on said frequency, and the audio signal that receives is exported through earphone.
2. the audio transmission method in the video-audio playing system according to claim 1 is characterized in that, after said player is accomplished being provided with of said frequency, also comprises following steps:
Said player is emissioning testing signal on said frequency;
The intensity of the test signal that said remote controller will receive on said frequency feeds back to said player;
Said player is adjusted the transmitting power of audio signal according to the intensity of the said test signal of feedback.
3. the audio transmission method in the video-audio playing system according to claim 1 is characterized in that, remote controller indication player is provided for comprising following substep in the step of frequency of transmitting audio signal:
Said remote controller sends the control information that said frequency is set through infrared ray to said player;
The said frequency that said player will be provided with feeds back in the step of said remote controller, comprises following substep:
Said player feeds back to said remote controller with said frequency through infrared ray.
4. the audio transmission method in the video-audio playing system according to claim 1; It is characterized in that; Said player is according to user's selection, and decision-making adopts manual mode to be provided for the frequency of transmitting audio signal, perhaps adopts automatic mode to be provided for the frequency of transmitting audio signal;
If decision-making adopts manual mode to be provided for the frequency of transmitting audio signal, then further judge whether to prolong the frequency that was provided with last time, if judge the frequency that prolongs with setting last time, the frequency that then will be provided with last time is used for the frequency of transmitting audio signal as this; If do not prolong the frequency that was provided with last time, then reset the frequency that this is used for transmitting audio signal by the user;
If decision-making adopts automatic mode to be provided for the frequency of transmitting audio signal; Then search for idle frequency automatically by said player; And by the user the idle frequency that searches is automatically confirmed, will through the idle frequency point setting that the user confirms the frequency that is used for transmitting audio signal.
5. the audio transmission method in the video-audio playing system according to claim 4 is characterized in that, saidly searches for idle frequency automatically by said player, and in the step of the idle frequency that searches automatically being confirmed by the user, comprises following substep:
Begin from current frequency, frequency of every stepping just detects the intensity of a signal;
If the intensity of detected signal, judges then that the frequency at this signal place is idle frequency less than pre-set threshold;
The idle frequency of judging is shown to the user through video screen, supplies the user to confirm;
To through the idle frequency point setting that the user confirms the frequency that is used for transmitting audio signal.
6. according to the audio transmission method in each described video-audio playing system in the claim 1 to 5, it is characterized in that, after said player is accomplished being provided with of said frequency, also comprise following steps:
The said frequency that is provided with is presented on the video screen.
7. according to the audio transmission method in each described video-audio playing system in the claim 1 to 5, it is characterized in that, be provided at said remote controller indication player also comprising following steps before the step of frequency of transmitting audio signal:
Said remote controller need to judge whether the audio signal of transmission frequency modulation according to the instruction of user's input;
Transmit the audio signal of frequency modulation if desired, then get into the step that said indication player is provided for the frequency of transmitting audio signal again.
8. a video-audio playing system comprises remote controller and player, it is characterized in that, said remote controller comprises:
The control information sending module is used for sending the indication that frequency is set to said player;
The frequency point information receiver module is used for receiving the frequency that this player is provided with from said player;
The audio signal receiver module is used on said frequency receiving the audio signal of the frequency modulation of said player emission;
The earphone power amplifier module, the audio signal of the frequency modulation that is used for said audio signal receiver module is received is exported through earphone;
Said player comprises:
The control information receiver module is used to receive the indication that frequency is set from remote controller;
The frequency point setting module is used for after said control information receiver module is received the said indication from remote controller, is provided for transmitting the frequency of the audio signal of frequency modulation;
The frequency point information sending module is used for sending the frequency that said frequency point setting module is provided with to said remote controller;
The audio signal transmitter module is used for the frequency in said frequency point setting module setting, the audio signal of emission frequency modulation.
9. video-audio playing system according to claim 8 is characterized in that, the audio signal transmitter module in the said player also is used for emissioning testing signal on said frequency;
Control information sending module in the said remote controller also is used for the intensity of the test signal that on said frequency, receives is fed back to said player;
Said player also comprises adjusting module, is used for the intensity according to the said test signal of feedback, the transmitting power of adjustment audio signal.
10. video-audio playing system according to claim 8; It is characterized in that; Said control information sending module sends the said indication that frequency is set through infrared ray to said player, and said control information receiver module receives the said indication that frequency is set from said remote controller through infrared ray;
Said frequency point information sending module sends the frequency that said frequency point setting module is provided with through infrared ray to said remote controller, and said frequency point information receiver module receives the frequency that this player is provided with through infrared ray from said player.
11. video-audio playing system according to claim 8 is characterized in that, the frequency point setting module comprises the model selection submodule, manually submodule and submodule is set automatically is set;
Said model selection submodule is used for the selection according to the user, and the decision-making triggering is said manually to be provided with submodule or to trigger the said submodule that is provided with automatically;
The said submodule that manually is provided with is used to adopt manual mode to be provided for the frequency of transmitting audio signal; The said submodule that manually is provided with comprises following subelement:
Frequency prolongs uses judgment sub-unit, is used to judge whether to prolong the frequency that was provided with last time;
Frequency manually is provided with subelement, is used for prolonging with judgment sub-unit at said frequency judging that when prolonging the frequency that was provided with last time, the frequency that will be provided with last time is used for the frequency of transmitting audio signal as this; Prolong at said frequency and to judge with judgment sub-unit and to reset the frequency that this is used for transmitting audio signal by the user when not prolonging the frequency that was provided with last time;
The said submodule that is provided with automatically is used for searching for automatically idle frequency, and by the user the idle frequency that searches is automatically confirmed, will be the frequency that is used for transmitting audio signal through the idle frequency point setting that the user confirms.
12. video-audio playing system according to claim 11 is characterized in that, the said submodule that is provided with automatically comprises following subelement:
The input subelement is used for beginning from current frequency, and frequency of every stepping just detects the intensity of a signal;
Judgment sub-unit is used for the intensity with the detected signal of said input subelement, compares with pre-set threshold, when the intensity of detected signal during less than said threshold value, judges that the frequency at this signal place is idle frequency;
Confirm subelement, be used for the idle frequency that said judgment sub-unit is judged is shown to the user through display unit, supply the user to confirm;
Frequency is provided with subelement automatically, and being used for the idle frequency point setting of confirming through the user is the frequency that is used for transmitting audio signal.
13. each described video-audio playing system in 12 is characterized in that said video-audio playing system also comprises at least one FM reception end according to Claim 8, is used to receive the audio signal of frequency modulation;
Said control information sending module also is used for the frequency that said frequency point information receiver module receives is presented at display unit.
14. each described video-audio playing system in 12 according to Claim 8; It is characterized in that; Said remote controller also comprises the startup module, is used for the instruction according to user's input, need to judge whether the audio signal of transmission frequency modulation; And when judgement needs the audio signal of transmission frequency modulation, trigger said control information sending module.
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